jennifer lopez! >> reporter: rock 'n' roll icon steven tyler and music movie superstar jennifer lopez say they're thrilled to join one of television's top shows. >> you know, it's being a part of something much bigger than yourself. >> i'm so excited to be here. i'm so excited to work with all of you, to watch you grow and to watch the journey that we're about to take together. >> reporter: the celebrity judges joined returning member randy jackson at the table. together they're taking the competition to the next level. >> between the heart and the passion and the street c rerkz d, this is going to be a richter scale event. >> i'm looking for the next michael jackson. >> we're looking, like randy said, for the best "american idol" ever. >> reporter: singers will be encouraged to sing inside their own genre, not having to spread their wings, and second there will be no celebrity guest judges this year. in englewood, california, adam housely. >> fox 5 is your idol station. we're going to break down the